Quaternary Science Reviews最新文献_第5页

Highstand, drop and stillstand: reconstructing MIS 5.5 sea-level changes in the central Mediterranean 高地、下降和静止：重建地中海中部MIS 5.5海平面变化

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-14 DOI: 10.1016/j.quascirev.2026.109801

Vincenzo De Santis , Alessia Logrieco , Paolo Montagna , Giovanni Scicchitano , Giuseppe Mastronuzzi , Ernesto Mesto , Edwige Pons-Branchu , Giovanni Scardino , José E. Ortiz , Yolanda Sánchez-Palencia , Trinidad Torres , Massimo Caldara

Through the integration of new geomorphological, geological and chronological data from the Taranto area in southern Italy with existing literature information from the nearby Lizzano area, two terraced units and associated paleoshorelines dating back to the Last Interglacial (LIG) have been recognised: i) Unit 1 (U1LIG), further subdivided into lower/inner and upper/outer, associated with a paleoshoreline at +30 ± 2 m (PS1LIG), and ii) Unit 2 (U2LIG), associated with a paleoshoreline at +20 ± 2 m (PS2LIG).

U1LIG-lower/inner, dated between ca. 135 and ca. 128 ka, exhibits stratal geometry, lithofacies distribution, and stratigraphic relationship with the U1LIG-upper/outer that together point to the transgression (sea level-rise) toward the first highstand of MIS 5.5.

U1LIG-upper/outer, dated to ca. 127 ka, shows stratal geometry, lithofacies distribution, and stratigraphic relationship with U1LIG-lower/inner, that together identify the MIS 5.5 highstand.

The lower U2LIG unit, which gives a broad chronological range of 127-122 ka, and its associated lower paleoshoreline PS2LIG, record a second, lower sea-level stillstand/slow sea-level lowering during MIS 5.5, occurred after a rapid drop in sea level of ca. 9 m.

Drawing on these constraints, and assuming that the paleoshorelines represent past sea-levels, a constant regional uplift rate and a sea-level within a range of +2 to +9 m at the first and highest MIS 5.5 highstand, we reconstruct, for the study areas, that: i) the first highstand of MIS 5.5 peaked at ca. 127 ka BP; ii) thereafter, an intra-LIG sea-level drop of ca. 9.4 ± 4.1 m occurred; iii) the rapid drop was followed by a second stillstand/slow sea-level lowering (represented by PS2LIG in our study area). The rapid sea-level drop and the following second stillstand/slow sea-level lowering can be assumed in the interval of ca. 127-122 ka. This intra-LIG sea-level pattern observed in our study areas is very similar to that recently reported in other areas of the central Mediterranean and worldwide, as well as in some global sea-level curves. The post-127 ka sea-level fall and the following second stillstand/slow sea-level lowering coincide with the time of deposition of the Sapropel S5. The large amount of eluvial and colluvial material in U2LIG, together with its deltaic facies, are the local signal of the Sapropel S5 event. This implies that, during the deposition period of U2LIG that coincides with the S5 event, southern Italy experienced intensified rainfall. Our data refine and extend previous findings that warm interglacial periods, marked by enhanced freshwater flux by the monsoonal Nile (and wadi-systems) floods, were characterized by increased precipitation in the NW Mediterranean.

通过将意大利南部塔兰托地区的新地貌、地质和年代学数据与附近Lizzano地区的现有文献信息相结合，两个梯田单元和相关的古海岸线可以追溯到末次间冰期（LIG）：i)单元1 （U1LIG)，进一步细分为下/内和上/外，与+30±2 m古海岸线（PS1LIG）有关；ii）单元2 (U2LIG)，与+20±2 m古海岸线（PS2LIG）有关。u1ligi -lower/inner的年代在约135 ~约128 ka之间，显示了地层几何、岩相分布以及与u1ligi -upper/outer的地层关系，共同指向MIS 5.5的第一个高点的海侵（海平面上升）。u1ligi -upper/outer的年代约为127 ka，显示了地层几何形状、岩相分布以及与u1ligi -lower/inner的地层关系，共同确定了MIS 5.5高点。较低的U2LIG单元（其年代学范围为127-122 ka）及其相关的较低古海岸线PS2LIG在MIS 5.5期间记录了第二次较低的海平面静止/缓慢的海平面下降，发生在海平面快速下降约9 m之后。根据这些限制条件，假设古海岸线代表了过去的海平面、恒定的区域抬升速率和MIS 5.5第一和最高高度海平面在+2 ~ +9 m范围内，我们对研究区进行了重建：1)MIS 5.5第一高度在约127 ka BP达到峰值；ii)此后，lig内海平面下降约9.4±4.1 m；iii)快速下降之后是第二次静止/缓慢的海平面下降（以我们研究区域的PS2LIG为代表）。在约127 ~ 122ka的时间间隔内，可以假定海平面快速下降和随后的第二次静止/缓慢下降。在我们的研究区域观察到的这种lig内海平面模式与最近在地中海中部和世界范围内的其他地区以及一些全球海平面曲线中报道的非常相似。127 ka后的海平面下降和随后的第二次静止/缓慢下降与S5沙推进体的沉积时间一致。U2LIG地区大量的淋积物和崩积物及其三角洲相是S5次saupropel事件的局部信号。这意味着，在U2LIG沉积期间，与S5事件相吻合，意大利南部经历了强降雨。我们的数据完善和扩展了之前的发现，即温暖的间冰期，以季风性尼罗河（和瓦底河系统）洪水增加的淡水通量为标志，其特征是地中海西北部降水增加。

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引用次数: 0

Holocene relative sea-level changes in the middle part of the Polish coast, southern Baltic Sea 波罗的海南部波兰中部海岸全新世相对海平面变化

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-13 DOI: 10.1016/j.quascirev.2025.109785

Paweł Sydor

The problem of relative sea-level (RSL) changes is one of the main issues in Baltic Sea research. The aim of the study is to reconstruct Holocene RSL changes in the middle part of the Polish coast. To develop the RSL curve for the study area, 290 RSL data points were used. From these, 184 data points (32.7 %) are terrestrial limiting points (TLP), and 106 data points (18.8 %) are marine limiting points (MLP). The data allow for reconstructing water-level changes for the last 10.5 ka b2k, i.e., for the stages of Ancylus Lake and Littorina Sea, starting from an elevation of ca. 28 m below present sea level (b.s.l.).

In the period 10.5–10.2 ky b2k, a fast water level rise (Ancylus transgression) occurred with an average rate of ca. 30 mm/yr. About 10.2 ky b2k, the water level reached ca. 19 m b.s.l. The formation of a drainage channel in the area of the present Belt Sea resulted in a regression of the water level of Ancylus Lake to 24 m b.s.l., with an average rate of ca. 12.5 mm/yr, in the period 10.2–9.8 ky b2k. After the connection of the Baltic with the ocean 9.8 ky b2k, during the period 9.8–8.0 ky b2k, a fast sea level rise (Littorina transgression) occurred in the study area. An average rate of water level rise during the Littorina transgression was ca. 9.4 mm/yr. The period 8.0–6.0 ky b2k is characterized by gradual decrease of the rate of sea level rise. Between 8.0 and 7.0 ky b2k sea level rose with average rate ca. 3 mm/yr, and ca. 1 mm/yr between 7.0 and 6.0 ky b2k. Over the last 6.0 ky, the rate of sea-level rise has been slower, and it was ca. 0.5 mm/yr. Taking into account similarities to other regions of the Baltic Sea and the world ocean, it can be concluded that sea-level changes in the study area in the last 9.8 ky have been eustatic in nature.

相对海平面变化问题是波罗的海研究的主要问题之一。研究的目的是重建波兰中部海岸全新世RSL的变化。为了绘制研究区域的RSL曲线，使用了290个RSL数据点。其中，184个数据点（32.7%）为陆地极限点（TLP）， 106个数据点（18.8%）为海洋极限点（MLP）。这些数据允许重建最近10.5 ka b2k的水位变化，即Ancylus湖和Littorina海阶段，从目前海平面（b.s.l）以下约28 m的高度开始。在10.5 ~ 10.2 ky b2k期间，发生了一次快速的水位上升（Ancylus海侵），平均速度约为30 mm/yr。10.2 ky - 9.8 ky - b2k期间，安丘勒斯湖水位下降至24 m b.s.l，平均下降速率约为12.5 mm/年。在波罗的海与海洋连接9.8 ky b2k后，9.8 - 8.0 ky b2k期间，研究区发生了一次快速的海平面上升（Littorina海侵）。在Littorina海侵期间，平均水位上升速率约为9.4 mm/yr。8.0 ~ 6.0 kb2k期间，海平面上升速率呈逐渐下降的趋势。在8.0 ~ 7.0 kb2k期间，海平面平均上升速率约为3 mm/年，在7.0 ~ 6.0 kb2k期间，海平面平均上升速率约为1 mm/年。在过去的6.0天里，海平面上升的速度变慢了，大约为0.5毫米/年。考虑到与波罗的海其他地区和世界海洋的相似之处，可以得出结论，在过去的9.8天里，研究区域的海平面变化本质上是上升的。

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引用次数: 0

Onshore-offshore evidence for active tectonics and the propagation of the Zagros deformation front into the Persian Gulf 活动构造和扎格罗斯变形锋向波斯湾传播的陆上-海上证据

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-13 DOI: 10.1016/j.quascirev.2025.109752

Aram Fathian , Hemin Koyi , Stefan Back , Hamid Nazari , Dan H. Shugar , Mohammad Ali Shokri , Klaus Reicherter

The Zagros Mountains in southwest Iran are a young orogen displaying the geodynamic evolution in an active continental collision zone. We combine the analysis of geomorphology, remote sensing, geochronology, and seismic-reflection data to investigate the current kinematics of the Zagros foreland in SW Iran and identify tectonically active structures associated with the propagation of the deformation front of the Zagros fold-and-thrust belt. Seismic-reflection data in the Persian Gulf show evidence of syndepositional folding since at least >300 ka BP. These data define the propagating deformation front of the Zagros fold-and-thrust belt by outlining actively growing, modern folds in the Persian Gulf several tens of kilometers off the coast. RTK GNSS surveying and geochronological dating were used to estimate the uplift rate of terraces on the southwestern limb of an onshore anticline. The uplift of such terraces and the development of new folds in the Persian Gulf indicate that shortening in the Zagros is accommodated within a wide zone (∼40–50 km) rather than along a linear deformation front. Congruent dextral bending of the northern hinges of fold axes, both on- and offshore, is interpreted to be linked to ongoing shortening accompanied by slip partitioning along the N-trending basement faults. This study demonstrates the benefit of analyzing contemporaneous incipient deformation and syn-kinematic sedimentation to outline a progressive deformation front in an active fold-and-thrust belt.

伊朗西南部的扎格罗斯山脉是一个年轻的造山带，在一个活跃的大陆碰撞带中显示出地球动力学演化。结合地形学、遥感、年代学和地震反射数据分析，研究了伊朗西南部扎格罗斯前陆的当前运动学，并识别了与扎格罗斯褶皱冲断带变形前沿传播相关的构造活动构造。波斯湾的地震反射资料显示至少自300 ka BP以来同沉积褶皱的证据。这些数据通过描绘波斯湾离海岸几十公里处活跃生长的现代褶皱，定义了扎格罗斯褶皱冲断带的传播变形前沿。采用RTK GNSS测量和年代学方法估算了陆缘背斜西南缘阶地的隆升速率。这些阶地的隆起和波斯湾新褶皱的发育表明，扎格罗斯的缩短是在一个宽的区域内（~ 40-50公里）进行的，而不是沿着一条线性变形前沿。在陆上和海上，褶皱轴北部铰链的同向右弯曲被解释为与沿n向基底断层的滑动分割伴随的持续缩短有关。该研究表明，分析同时期的早期变形和同运动沉积有利于勾勒出活动褶皱冲断带中的渐进变形前沿。

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引用次数: 0

Deglacial and Holocene variability of intermediate water masses in the Ligurian Sea based on a multi-proxy approach 基于多代理方法的利古里亚海中间水团的脱冰和全新世变率

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-13 DOI: 10.1016/j.quascirev.2026.109800

Mar Selvaggi , Isabel Cacho , José N. Pérez-Asensio , Dimitris Evangelinos , Pierluigi Martinelli , Laura Bronzo , Albert Català , Leopoldo D. Pena , Jaime Frigola , Rocco Gennari , Sergio Bonomo , Antonio Cascella , Fabrizio Lirer , Letizia Di Bella

In this study, we combine analyses of benthic foraminiferal assemblages, grain-size distributions, and elemental composition (X-ray fluorescence) with geochemical measurements of foraminiferal coatings (U/Mn_fc) and stable oxygen isotopes (δ¹⁸O) from sediment core NDT_22_2016 (432 m water depth) to reconstruct oceanographic variability over the past ∼18 kyr. Our findings reveal a significant influx of shelf-derived benthic foraminiferal assemblages during Heinrich Stadial 1 (HS1), which we attribute to enhanced melting of Northern Apennines glaciers, particularly during HS1b (∼17-16 kyr). These observations support the occurrence of warm summers despite the overall regional cooling linked to HS1. At the same time, micropaleontological and geochemical data record an abrupt decline in mid-depth oxygen conditions, potentially reflecting HS1-driven changes in the properties of intermediate waters originating from the eastern Mediterranean Sea. During the formation of Sapropel 1 (S1) in the eastern basin, the presence of well-oxygenated waters and the formation of a sandy condensed layer are interpreted to reflect intense sediment winnowing associated with episodes of dense shelf-water formation in the study region. We argue that these conditions may have facilitated the development of a western-sourced intermediate water mass, which would have occupied the pathway of weakened eastern-sourced Mediterranean waters during S1 deposition. We further propose that the modern Mediterranean circulation pattern was established at ∼6 kyr, marked by notable changes in both sedimentary and benthic ecosystem records. Lastly, a significant shift in sediment supply over the last ∼2 kyr is linked to pronounced anthropogenic impacts.

在这项研究中，我们将底栖有孔虫组合、粒度分布和元素组成（x射线荧光）分析与有孔虫涂层（U/Mnfc）和稳定氧同位素（δ18O）的地球化学测量相结合，从沉积物岩芯NDT_22_2016 （432 m水深）中重建过去~ 18 kyr的海洋变化。我们的研究结果表明，在海因里希第1期（HS1）期间，陆架衍生的底栖有孔虫组合大量涌入，我们将其归因于北亚平宁冰川的加速融化，特别是在HS1b期间（~ 17-16 kyr）。这些观测结果支持温暖夏季的发生，尽管整体区域变冷与HS1有关。与此同时，微古生物学和地球化学数据记录了中深度氧气条件的突然下降，可能反映了源自地中海东部的hs1驱动的中间水性质的变化。在盆地东部Sapropel 1 （S1）形成过程中，富氧水体的存在和砂质凝聚层的形成反映了研究区密集陆架水形成过程中强烈的沉积物筛分。我们认为，这些条件可能促进了西部来源的中间水团的发展，这些中间水团可能在S1沉积期间占据了减弱的东部来源的地中海水域的通道。我们进一步提出现代地中海环流模式是在~ 6 kyr建立的，以沉积和底栖生态系统记录的显著变化为标志。最后，在过去的~ 2kyr中，沉积物供应的显著变化与明显的人为影响有关。

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引用次数: 0

Climate-eutrophication-anoxia interactions in Late Glacial Soppensee, Switzerland: Forcings, non-linear responses and recovery 冰川晚期Soppensee气候-富营养化-缺氧相互作用：强迫、非线性响应和恢复

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-13 DOI: 10.1016/j.quascirev.2026.109804

Stan J. Schouten , Martin Grosjean , Paul D. Zander , Noé R.M.M. Schmidhauser , Luyao Tu , Andrea Lami , Hendrik Vogel , Jacqueline van Leeuwen , Petra Zahajská

Combined effects of climate warming and anthropogenic nutrient loadings lead to lake eutrophication and anoxia globally. Because of chemical feedbacks, lakes under multiple stressors often respond in non-linear ways. However, it remains unclear whether climate change alone can lead to non-linear lake responses in the absence of anthropogenic nutrient disturbances. Here, we investigate the interactions between climate variability, nutrient cycling and trophic state changes, mixing regimes, anoxia and related chemical feedback in a small kettle-hole lake in Switzerland during Late Glacial times (15.2–12.6 cal ka BP), a period known for high-amplitude climate change in pre-anthropogenic times.

After its formation during Heinrich Stadial 1 (>15 cal ka BP), Soppensee was oligotrophic and well-mixed. Soppensee became eutrophic and developed anoxia at 14.25 cal ka BP. Phosphorus (P) was released from sediments through the reductive dissolution of Fe-oxyhydroxides, fuelling eutrophication. Eutrophication lagged the Bølling warming (14.65 cal ka BP) by 400 years, suggesting that rising temperatures were not the trigger for eutrophication. Instead, eutrophication responded non-linearly to forest closure (threshold at 76 % arboreal pollen AP), which shielded Soppensee from wind mixing, enhancing lake stratification, anoxia and P release, intensifying eutrophication. These conditions ended during the 200-years cold period of the Aegelsee Oscillation (GI-1d, ca. 14.0 cal ka BP) when the landscape regionally opened (AP<76 %); the lake became well-mixed, oxygenated and P was efficiently sequestered. Throughout the Allerød (13.9–12.8 cal ka BP), enhanced Fe input prompted diagenetic vivianite formation, sequestering P in sediments, naturally remediating lake eutrophication despite closed forests, warm temperatures, lake stratification and anoxia.

气候变暖和人为营养物负荷的共同作用导致全球湖泊富营养化和缺氧。由于化学反馈，湖泊在多重压力下往往以非线性的方式做出反应。然而，目前尚不清楚在没有人为营养物干扰的情况下，气候变化是否会导致非线性湖泊响应。在此，我们研究了瑞士一个小壶洞湖在晚冰期（15.2-12.6 cal ka BP）的气候变率、营养循环和营养状态变化、混合制度、缺氧和相关化学反馈之间的相互作用，这一时期是前人类活动时期已知的高幅度气候变化时期。在Heinrich Stadial 1 （>15 cal ka BP）形成后，Soppensee是寡营养和混合良好的。在14.25 cal ka BP时，水母开始富营养化并出现缺氧。磷(P)通过铁氧氢氧化物的还原性溶解从沉积物中释放出来，促进富营养化。富营养化滞后于b_lling变暖（14.65 cal ka BP） 400年，表明气温上升不是富营养化的触发因素。相反，富营养化对森林封育（阈值为76%）有非线性响应，森林封育屏蔽了风混合，增强了湖泊分层、缺氧和磷释放，加剧了富营养化。这些条件在Aegelsee涛动（GI-1d，约14.0 cal ka BP） 200年冷期结束，景观区域开放（AP< 76%）；湖泊变得混合良好，含氧和磷被有效地隔离。在整个allergo ød （13.9-12.8 cal ka BP）期间，铁输入增强促进了成岩橄榄岩的形成，固存了沉积物中的磷，在森林封闭、温度升高、湖泊分层和缺氧的情况下自然修复了湖泊富营养化。

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引用次数: 0

Underwater topography regulates the relationship between water depth and sedimentary n-alkane distributions in lakes 水下地形调节了湖泊水深与沉积正构烷烃分布的关系

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-12 DOI: 10.1016/j.quascirev.2026.109803

Durui Lin , Enlou Zhang , Weiwei Sun , Xianqiang Meng , Zhenyu Ni , Yao Wang

The n-alkane proxies have been widely employed to reconstruct past lake water levels. However, the associated hydrological interpretations remain debated: some studies suggested a lower proportion of aquatic macrophytes (P_aq) corresponding to deeper water depths, whereas others argued it indicated shallower conditions. In this study, a comprehensive survey of vegetation, terrestrial soils, and lake surface sediments in the Erhai Lake basin, southwest China, was conducted to examine the environmental significance of n-alkanes. Our results showed that the highest P_aq values occurred in shallow flat areas, consistent with the spatial distributions of modern submerged plants. Notably, the P_aq proxy exhibits completely opposite relationships with water depth in different underwater topographies. Specifically, the P_aq index shows a negative correlation with water depth in the gently sloping northern and southern sub-basins (r = −0.78), but a positive correlation in the steep central sub-basin (r = 0.63). The former pattern reflected more suitable growth conditions for submerged plants in extensive shallow littoral zones. In contrast, the steep littoral zone of the central basin lacked such gentle slopes for submerged plant growth. These findings highlight the essential role of underwater topography in interpreting n-alkane as a lake-level indicator. By accounting for underwater topographic influences, n-alkane-inferred lake-level changes in Erhai Lake since the last deglacial exhibited an increasing trend followed by a decline from the early to late Holocene, regulated by monsoon precipitation and summer insolation. The application of the P_aq index for the quantitative reconstruction of water depths has been explored but requires further refinement and improvement. This study provides an essential methodological framework for reconstructing historical water levels using P_aq index, thereby strengthening paleohydrological reconstructions.

正构烷烃替代指标已被广泛用于重建过去的湖泊水位。然而，相关的水文解释仍然存在争议：一些研究表明，较低的水生大型植物（Paq）比例对应于较深的水深，而另一些研究则认为它表明较浅的条件。本文通过对洱海流域植被、陆地土壤和湖泊表层沉积物的综合调查，探讨了正构烷烃的环境意义。结果表明，Paq值最高的区域为浅滩区，与现代淹没植物的空间分布一致。值得注意的是，在不同的水下地形下，Paq与水深的关系完全相反。Paq指数与水深呈负相关（r = - 0.78），而与水深呈正相关（r = 0.63）。前一种模式反映了广泛的浅海带中淹没植物更适合的生长条件。相比之下，中部盆地陡峭的沿海地带缺乏这样的缓坡以供水下植物生长。这些发现突出了水下地形在解释正构烷烃作为湖泊水位指标方面的重要作用。考虑水下地形的影响，洱海末次冰期以来正构烷烃推断的湖泊水位变化受季风降水和夏季日照的调节，在全新世早期至晚期呈现先上升后下降的趋势。对Paq指数在水深定量重建中的应用进行了探索，但还需要进一步的细化和完善。该研究为利用Paq指数重建历史水位提供了重要的方法框架，从而加强了古水文重建。

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引用次数: 0

Holocene climatic changes in the Kerguelen archipelago (South Indian Ocean) based on marine and lacustrine palaeoclimatic archives 基于海洋和湖泊古气候档案的南印度洋凯尔盖伦群岛全新世气候变化

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-12 DOI: 10.1016/j.quascirev.2025.109753

Emeline Bellet , Guillemette Ménot , Christine Piot , Xavier Crosta , Vincent Grossi , Marie-Alexandrine Sicre , Mercedes Mendez-Millan , Vincent Klein , Salomé Ansanay-Alex , Matthew Makou , Jérôme Poulenard , Emmanuel Malet , Bernard Fanget , Eivind Støren , Nicolas Leviavan , Aymeric Servettaz , Jostein Bakke , Pierre Sabatier , Fabien Arnaud

Climatic variability in the Southern Hemisphere is largely controlled by the latitudinal position of the Southern Hemisphere Westerly Winds (SHW), whose migration influences precipitation, temperature, and Antarctic upwelling. This study presents the results of analyses of two lacustrine sediment cores from Lake Armor, located on the subantarctic Kerguelen Islands (49°15′S, 69°10′E), within the SHW belt. Lipid biomarkers (Glycerol Dialkyl Glycerol Tetraethers, n-alkanes, and their hydrogen isotopes) were used to reconstruct mean annual air temperature above freezing (MAF) and humidity conditions. These records are compared with a high-resolution diatom-based summer sea surface temperature (SST) reconstruction from marine core MD11-3353, situated 150 km southwest of Lake Armor.

In the late glacial and Early Holocene, our results reveal a period of warm air temperature, comparable to current values and very warm sea surface temperature, 5 °C above the current values. Around 9000 cal a BP, an abrupt transition occurred, marked by a cooling of 5 °C in SST and 1.5 °C in MAF, interpreted as a northward migration of the SHW and associated oceanic fronts. The Mid-to-Late Holocene period is characterized by pronounced MAF variability, including a notably warm interval between 3000 and 2000 cal a BP, when n-alkane dD suggests the prevalence of wetter conditions. Since ∼250 cal a BP, a southward migration of the SHW has produced a 2.5 °C rise in MAF.

Our findings are overall consistent with previous studies from the Indian Ocean, but permit us to go a step further as by comparing SSTs and air temperatures. This suggests that SST is not a reliable predictor of air temperature on the Kerguelen Islands, particularly during the Early Holocene. We hence argue that Kerguelen air temperature is predominantly controlled by the position of westerly winds, as an indicator of reorganisations in air mass trajectories.

南半球的气候变率主要受南半球西风（SHW）的纬度位置控制，西风的迁移影响降水、温度和南极上升流。本文介绍了位于亚南极Kerguelen群岛（49°15'S, 69°10'E）的两个湖泊沉积物岩心的分析结果。脂质生物标志物（甘油二烷基甘油四醚、正构烷烃及其氢同位素）用于重建年平均冰点以上气温（MAF）和湿度条件。这些记录与位于阿armor湖西南150公里的MD11-3353海洋岩芯的高分辨率夏季海面温度（SST）重建进行了比较。在冰期晚期和全新世早期，我们的研究结果揭示了一段与当前值相当的暖空气温度和非常温暖的海面温度，比当前值高5°C。在9000 cal a BP前后，发生了海温降温5°C、MAF降温1.5°C的突变，这被解释为西南暖风及其相关洋锋的北移。全新世中晚期以MAF显著变率为特征，包括3000 - 2000 cal a BP之间的一个显著暖期，此时正构烷烃dD表明普遍存在湿润条件。自~ 250 cal a BP以来，西海暖风向南迁移导致MAF升高2.5°C。我们的发现总体上与印度洋先前的研究一致，但允许我们更进一步，通过比较海温和气温。这表明海温并不是凯尔盖伦群岛气温的可靠预测指标，尤其是在全新世早期。因此，我们认为凯尔盖伦的气温主要由西风的位置控制，作为气团轨迹重组的一个指标。

{"title":"Holocene climatic changes in the Kerguelen archipelago (South Indian Ocean) based on marine and lacustrine palaeoclimatic archives","authors":"Emeline Bellet , Guillemette Ménot , Christine Piot , Xavier Crosta , Vincent Grossi , Marie-Alexandrine Sicre , Mercedes Mendez-Millan , Vincent Klein , Salomé Ansanay-Alex , Matthew Makou , Jérôme Poulenard , Emmanuel Malet , Bernard Fanget , Eivind Støren , Nicolas Leviavan , Aymeric Servettaz , Jostein Bakke , Pierre Sabatier , Fabien Arnaud","doi":"10.1016/j.quascirev.2025.109753","DOIUrl":"10.1016/j.quascirev.2025.109753","url":null,"abstract":"<div><div>Climatic variability in the Southern Hemisphere is largely controlled by the latitudinal position of the Southern Hemisphere Westerly Winds (SHW), whose migration influences precipitation, temperature, and Antarctic upwelling. This study presents the results of analyses of two lacustrine sediment cores from Lake Armor, located on the subantarctic Kerguelen Islands (49°15′S, 69°10′E), within the SHW belt. Lipid biomarkers (Glycerol Dialkyl Glycerol Tetraethers, <em>n-</em>alkanes, and their hydrogen isotopes) were used to reconstruct mean annual air temperature above freezing (MAF) and humidity conditions. These records are compared with a high-resolution diatom-based summer sea surface temperature (SST) reconstruction from marine core MD11-3353, situated 150 km southwest of Lake Armor.</div><div>In the late glacial and Early Holocene, our results reveal a period of warm air temperature, comparable to current values and very warm sea surface temperature, 5 °C above the current values. Around 9000 cal a BP, an abrupt transition occurred, marked by a cooling of 5 °C in SST and 1.5 °C in MAF, interpreted as a northward migration of the SHW and associated oceanic fronts. The Mid-to-Late Holocene period is characterized by pronounced MAF variability, including a notably warm interval between 3000 and 2000 cal a BP, when <em>n-</em>alkane dD suggests the prevalence of wetter conditions. Since ∼250 cal a BP, a southward migration of the SHW has produced a 2.5 °C rise in MAF.</div><div>Our findings are overall consistent with previous studies from the Indian Ocean, but permit us to go a step further as by comparing SSTs and air temperatures. This suggests that SST is not a reliable predictor of air temperature on the Kerguelen Islands, particularly during the Early Holocene. We hence argue that Kerguelen air temperature is predominantly controlled by the position of westerly winds, as an indicator of reorganisations in air mass trajectories.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109753"},"PeriodicalIF":3.3,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pollen-based reconstruction of Holocene vegetation dynamics and climate variability in northern Northeast China: Divergent hydroclimatic trends and possible westerly forcing 基于花粉的东北北部全新世植被动态和气候变率重建：不同的水文气候趋势和可能的西风强迫

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-10 DOI: 10.1016/j.quascirev.2026.109798

Sihan Sun , Yukun Zheng , Yong Luo , Yue Yao , Yue Wang , Ying Cheng , Yiyin Li , Hongyan Liu

Holocene vegetation and climate variability in Northeast China have attracted increasing attention in recent years. However, precise quantitative reconstructions remain limited, constraining a comprehensive understanding of regional environmental evolution and the underlying climatic mechanisms. In this study, we present a well-dated Holocene pollen record from Lake Daerbinluo, northern Northeast China. Vegetation dynamics were inferred using the biomization method, while mean annual temperature (Tann) and annual precipitation (Pann) were quantitatively reconstructed using a random forest approach. Our results reveal that a mosaic of forest and steppe dominated the region between 12,600 and 6200 Cal yr BP, transitioning to a temperate deciduous broadleaf forest as the dominant vegetation type after 6200 Cal yr BP. Climatic reconstructions show distinct trajectories for Tann and Pann. Tann exhibited a warming trend during the early Holocene, remained relatively high throughout the mid-Holocene, and experienced a slight decline during the late Holocene, broadly consistent with trends observed across the Northern Hemisphere. In contrast, Pann remained low but gradually increased prior to 5500 Cal yr BP, followed by an abrupt rise and sustained high levels during the mid to late Holocene, despite a minor decreasing tendency. These findings provide new insights into the climatic evolution and potential forcing mechanisms in Northeast China. The increased humidity during the mid-to late Holocene in our study area was likely driven by a strengthened westerly influence, despite the EASM remaining the principal moisture source, possibly via more frequent frontal cyclones and enhanced westerly moisture transport.

近年来，东北地区全新世植被和气候变率越来越受到人们的关注。然而，精确的定量重建仍然有限，限制了对区域环境演变和潜在气候机制的全面理解。本文对东北北部德尔宾罗湖的全新世花粉进行了详细的年代测定。利用生物化方法推测植被动态，利用随机森林方法定量重建年平均温度（Tann）和年降水量（Pann）。结果表明，在12600 ~ 6200 Cal yr BP期间，该地区以森林和草原的花叶林为主，6200 Cal yr BP后以温带落叶阔叶林为主。气候重建显示了坦恩和潘的不同轨迹。Tann在全新世早期表现出变暖趋势，在全新世中期保持相对较高，在全新世晚期略有下降，与整个北半球观测到的趋势基本一致。而在5500 Cal yr BP之前，Pann一直保持在较低水平，但逐渐上升，在全新世中后期，Pann急剧上升并保持在较高水平，尽管有轻微的下降趋势。这些发现为研究东北地区的气候演变和潜在的强迫机制提供了新的见解。全新世中后期湿度的增加可能是由西风影响的增强所驱动的，尽管东亚季风仍然是主要的水汽来源，可能是由于锋面气旋的频繁发生和西风水汽输送的增强。

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引用次数: 0

Variable erosion depth in the Chinese Loess Plateau driven by human activities: Evidence from lacustrine uranium comminution ages 人类活动驱动的中国黄土高原侵蚀深度变化：来自湖泊铀粉碎年龄的证据

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-10 DOI: 10.1016/j.quascirev.2025.109783

Run Zhang , Laifeng Li , David William Hedding , Dejun Wan

Human activities have substantially altered the transfer of surface material and sedimentary source-to-sink processes, particularly since the 1950s, thereby influencing global sediment flux. Surface erosion has profound effects on the Earth Critical Zone, wherein human activities significantly change erosion processes by intensifying both erosion flux and depth. While previous research has predominantly focused on erosion flux dynamics, variations in erosion depth remain poorly constrained due to the inherent limitations of conventional proxies (e.g., Sr-Nd isotopes, sedimentation rates), which typically fail to detect depth-related changes. The ²³⁴U/²³⁸U activity ratio, conventionally denoted as (²³⁴U/²³⁸U), can quantify sediment comminution age, which provides a qualitative indicator of changes in sediment sourcing or residence time. In this study, we utilize (²³⁴U/²³⁸U) derived from fine silicate fractions (<50 μm) of Gonghai Lake sediments, located in the northeastern Chinese Loess Plateau, to reconstruct historical variations in erosion depth and assess anthropogenic impacts. Sr-Nd isotopic data confirm the local and upwind loess deposits as the primary sedimentary source, while uranium isotope records reveal multiple-stage comminution age shifts since the 1900s, reflecting human-driven erosion depth changes. Notably, mass sedimentation rates (sediment flux, indicative of erosion flux) exhibit relatively little variation in the last century, demonstrating an inconsistency between erosion flux and depth. This work establishes lacustrine sedimentary records of uranium isotopes as a novel proxy for quantifying source-area erosion depth and demonstrates that beyond affecting erosion flux, human activities profoundly influence erosion depth—an essential factor for designing effective soil system conservation strategies.

特别是自1950年代以来，人类活动大大改变了地表物质的转移和沉积源-汇过程，从而影响了全球沉积物通量。地表侵蚀对地球临界带具有深远的影响，人类活动通过增强侵蚀通量和深度显著改变了地球临界带的侵蚀过程。虽然以前的研究主要集中在侵蚀通量动力学上，但由于传统代用物（例如Sr-Nd同位素、沉积速率）的固有局限性，侵蚀深度的变化仍然受到很差的约束，这些代用物通常无法检测到与深度相关的变化。234U/238U活度比，通常表示为（234U/238U），可以量化泥沙粉碎年龄，提供泥沙来源或停留时间变化的定性指标。在本研究中，我们利用来自中国东北黄土高原公海沉积物精细硅酸盐组分（<50 μm）的（234U/238U），重建了侵蚀深度的历史变化，并评估了人为影响。Sr-Nd同位素数据证实了本地和逆风黄土沉积是主要沉积源，而铀同位素记录显示了20世纪以来的多阶段粉碎年龄变化，反映了人类驱动的侵蚀深度变化。值得注意的是，质量沉积速率（沉积物通量，表明侵蚀通量）在上个世纪表现出相对较小的变化，表明侵蚀通量与深度之间不一致。本研究建立了湖相沉积铀同位素记录，作为量化源区侵蚀深度的新指标，并表明除了影响侵蚀通量外，人类活动还深刻影响侵蚀深度，这是设计有效土壤系统保持策略的重要因素。

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引用次数: 0

The Cistercians as forerunners of the Anthropocene: a multi-proxy paleoecological study from western Poland 作为人类世先驱的西多会人：波兰西部多代古生态研究

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-09 DOI: 10.1016/j.quascirev.2025.109779

Sambor Czerwiński , Piotr Kołaczek , Piotr Guzowski , Mariusz Gałka , Monika Karpińska-Kołaczek , Katarzyna Marcisz , Adam Izdebski , Malo Pilloix , Mariusz Lamentowicz

This study presents a high-resolution, multi-proxy paleoenvironmental reconstruction documenting nearly 1000 years of socio-ecological change under monastic and post-monastic land use based on the Święte peatland in western Poland. By integrating paleoecological proxies (pollen, micro- and macrocharcoal, testate amoebae, and plant macrofossils) with dense radiocarbon dating and historical records, we identified three major phases of landscape transformation: pre-Cistercian (ca. 1100–1270 CE), Cistercian (ca. 1270–1800 CE), and modern (ca. 1800–2017 CE). We show that after an initial capacity buildup, Cistercian economic activity significantly altered the local environment, initiating large-scale deforestation, peatland acidification, and hydrological shifts starting in the 14th century CE. Peat accumulation accelerated, enabling high-resolution insight into forest decline, agricultural expansion, and fine-grained socio-ecological dynamics, such as the temporary decline in human activity during the 17th-century CE military-epidemiological crisis, followed by a robust recovery. In the post-Cistercian phase, Prussian modernization efforts—such as wetland drainage and monoculture forestry—led to further ecological degradation. Our findings highlight the long-term impact of monastic and modern land use on wetland ecosystems, demonstrating how socio-political and economic dynamics shaped ecological resilience and induced degradation over centuries.

本文以波兰西部Święte泥炭地为研究对象，对近1000年来修道院和后修道院土地利用下的社会生态变化进行了高分辨率、多指标的古环境重建。通过将古生态指标（花粉、微碳和宏观碳、遗存变形虫和植物宏观化石）与密集的放射性碳定年和历史记录相结合，我们确定了景观转变的三个主要阶段：前西多世（约1100-1270 CE）、西多世（约1270-1800 CE）和现代（约1800-2017 CE）。我们发现，在最初的能力积累之后，西多会的经济活动显著地改变了当地的环境，从公元14世纪开始，引发了大规模的森林砍伐、泥炭地酸化和水文变化。泥炭积累加速，使人们能够高分辨率地了解森林衰退、农业扩张和细粒度的社会生态动态，例如17世纪CE军事流行病学危机期间人类活动的暂时减少，随后强劲复苏。在后西多会时期，普鲁士的现代化努力——如湿地排水和单一栽培林业——导致了进一步的生态退化。我们的研究结果强调了修道院和现代土地利用对湿地生态系统的长期影响，展示了几个世纪以来社会政治和经济动态如何塑造生态恢复力并导致退化。

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引用次数: 0